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Pediatric Radiology

, Volume 42, Issue 1, pp 57–62 | Cite as

Can early MRI distinguish between Kingella kingae and Gram-positive cocci in osteoarticular infections in young children?

  • Aikaterini Kanavaki
  • Dimitri Ceroni
  • David Tchernin
  • Sylviane Hanquinet
  • Laura MerliniEmail author
Original Article

Abstract

Background

K. kingae is a common causative organism in acute osteoarticular infections (OAIs) in children under 4 years of age. Differentiation between K. kingae and Gram-positive cocci (GPC) is of great interest therapeutically.

Objective

Our aim was to identify early distinguishing MRI features of OAIs.

Materials and methods

Thirty-one children younger than 4 years of age with OAI underwent MRI at presentation. Of these, 21 were caused by K. kingae and ten by GPC. Bone and soft tissue reaction, epiphyseal cartilage involvement, bone and subperiosteal abscess formation were compared between the two groups. Interobserver agreement was measured.

Results

Bone reaction was less frequent (P = 0.0066) and soft tissue reaction less severe (P = 0.0087) in the K. kingae group. Epiphysis cartilage abscesses were present only in the K. kingae group (P = 0.0118). No difference was found for bone abscess (P = 0.1411), subperiosteal abscess (P = 1) or joint effusion (P = 0.4414). Interobserver agreement was good for all criteria.

Conclusion

MRI is useful in differentiating K. kingae from GPC in OAI. Cartilaginous involvement and modest soft tissue and bone reaction suggest K. kingae.

Keywords

Paediatric osteoarticular infections Kingella kingae Gram-positive cocci MRI 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Aikaterini Kanavaki
    • 1
  • Dimitri Ceroni
    • 2
  • David Tchernin
    • 3
  • Sylviane Hanquinet
    • 1
  • Laura Merlini
    • 1
    Email author
  1. 1.Unit of Pediatric RadiologyGeneva University Hospital HUGGenevaSwitzerland
  2. 2.Unit of Pediatric OrthopedicsGeneva University HospitalGenevaSwitzerland
  3. 3.Department of RadiologyGeneva University HospitalGenevaSwitzerland

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